Neutral Density and Split Neutral Density Filters Explained

The purpose of neutral density filters is to decrease the amount of light that enters the camera. These filters have different density of filtration (1, 2, 3 stops). When you are looking to buy one, you will ask for either 0.3, 0.6, 0.9 or 2x, 4x, 8x. The technical process that happens when a neural filter is attached, is a slower shutter speed for a given aperture or, the other way around, a larger aperture on a given shutter speed. A good tip is combining this filter with a polarizer when shooting waterfalls. The split neutral density filter (or gradual neutral density filter) is not coated in a uniform manner (gradually change from transparen’t to translucent gray); otherwise, it does the same this as above explained. These types of filters have a hard edge differing from a manufacture from another. The hard edge split neutral density filters can be used … Read more

Center-Spot Filters

Center-Spot filters are a type of special effects filters; they are variations of Diffusion Filters. The center of a center spot filter is usually a hole (It can also be a flat and clear glass). The hole can be round or oval. The surrounding of the hole is a diffuse glass, sometimes colored. As a result, the image taken with this filter will be sharp and clear in the middle (where the hole is), and blured around the center. Its easy to figure out that a larger center spot filter has a larger central clear area. Center Spot Filters can be found in 4 different types as well: • diopters with a hole at the center • soft spot filters with a clear center and soft-focus ring • diffusion filters with a clear center • densely arranged concentric circles and a clear center (ex: Cokin’s Radial Zoom) As for the … Read more

Easily Make Your Own Homemade Photography Filters that Work

Yes, I’m serious, this it’s not a joke. You can create homemade photography filters for your camera (either digital or film). And yes, it’s incredible easy. homemade infrared filter: a piece of developed unexposed slide film OR a floppy disk ! homemade blue filter: a piece of exposed developed slide film with methyl blue homemade yellow filter: a piece of exposed developed slide film with methyl yellow IR Filter For obtaining the home made IR filter you need: piece of developed unexposed slide film or a floppy disk. You must go at the photo store and ask for developing the unexposed film. The home-made filter typically begins transmission at around 710-730nm. “Congo Blue” theater gels are designed to pass IR light in order to avoid damage from heating. When combined with red filters which block their visible blue, the combination is reported to pass the shorter wavelengths of infrared up to … Read more

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